package demo;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.Statement;

/*
 *  JDBC API 详解 DriverManager
 * */
public class JDBCDemo2_DriverManager {
    public static void main(String[] args) throws Exception {
        // 1.注册驱动  (jdk5后此步骤可省略不写)
        // Class.forName("com.mysql.jdbc.Driver");

        // 2.获取连接
        String url = "jdbc:mysql://127.0.0.1:3308/my_java?useSSL=false";
        String username = "root";
        String password = "123456";
        Connection conn = DriverManager.getConnection(url, username, password);

        // 3.定义sql
        String sql = "UPDATE account SET money =2000 WHERE id =1";

        // 4.获取执行sql的对象Statement
        Statement stmt = conn.createStatement();

        // 5.执行sql
        int count = stmt.executeUpdate(sql); // 受影响的行数
        System.out.println(count); // 打印

        // 释放资源
        stmt.close();
        conn.close();
    }
}
